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SINCE 1901, the International List of Causes of Death has been used in the United States for classifying causes on certificates of death. Because many certificates include two or more causes of death, it became necessary to formulate rules to decide the single cause to which the death should be ascribed. Such rules were drawn up under the supervision of the Bureau of the Census, of which the National Office of Vital Statistics was then a part. Since 1913, these rules, published as the Joint Cause Manual, have been in general use throughout the country. Both the International List and the Joint Cause Manual have been revised every ten years and every revision has resulted in breaks in the comparability of mortality statistics. The sixth revision of the International List (1948) resulted in a new list known as the International Statistical Classification of Diseases, Injuries and Causes of Death, which differs radically in arrangement, and to some extent in inclusions, from the old classifications. At the same time, the rules of the Manual of Joint Causes were discarded and rules new to this country were adopted. Previous revisions of the International |
